Hydromedusa maximiliani (Brazilian snake-necked turtle):  

Predictions & Data for this entry

Model:  std  

MRE = 0.052
SMSE = 0.078

Zero-variate data
ab275 273.5 (0.005347)dage at birtharkive
tp3285 3192 (0.02836)dtime since birth at puberty for femaleMartSouz2008
tpm6205 6071 (0.02167)dtime since birth at puberty for maleMartSouz2008
am3.65e+04 3.65e+04 (9.084e-06)dlife spanMartSouz2008
Lb2.85 2.87 (0.007184)cmplastron length at birthNoveSous2008
Lp8.8 9.652 (0.09679)cmplastron length at puberty for femaleMartSouz2008
Lpm10.2 11.89 (0.1653)cmplastron length at puberty for maleMartSouz2008
Li11.8 11.7 (0.008616)cmultimate plastron length for femalesMartSouz2008
Lim12.6 12.52 (0.006456)cmultimate plastron length for malesMartSouz2008
Wwb7.8 7.771 (0.003681)gwet weight at birthNoveSous2008
Wwi520 526 (0.01158)gultimate wet weightMartSouz2008
Ri0.008219 0.008219 (3.525e-05)#/dmaximum reprod ratearkive
Uni-variate data
DatasetFigure(RE)Independent variableDependent variableReference
LdL_f see Fig. 1 (0.2534)plastron lengthchange in plastron lengthMartSouz2008
LdL_m see Fig. 1 (0.126)plastron lengthchange in plastron lengthMartSouz2008
Pseudo-data at Tref
DataGeneralised animalHydromedusa maximilianiUnitDescription
v 0.02 0.01558cm/denergy conductance
kap 0.8 0.826-allocation fraction to soma
kap_R 0.95 0.95-reproduction efficiency
p_M 18 12.41J/d.cm^3vol-spec som maint
k_J 0.002 0.00047391/dmaturity maint rate coefficient
kap_G 0.8 0.7988-growth efficiency
k 0.3 0.3001-maintenance ratio


  • Males are assumed to differ from females by {p_Am} and E_Hb only
  • MartSouz2008 report in their Fig 1 growth rate in mm/yr, but this analysis assumes that it is actually in mm/d
  • In view of low somatic maintenance, pseudodata k_J = 0.002 1/d is replaced by pseudodata k = 0.3


  • [Wiki] http://en.wikipedia.org/wiki/Hydromedusa_maximiliani.
  • [arkive] http://www.arkive.org/brazilian-snake-necked-turtle/hydromedusa-maximiliani/.
  • [Kooy2010] S.A.L.M. Kooijman. Dynamic Energy Budget theory for metabolic organisation. Cambridge Univ. Press, Cambridge, 2010.
  • [MartSouz2008] F. I. Martins and F. L. Souza. Estimates of growth of the Atlantic rain forest freshwater turtle Hydromedusa maximiliani (Chelidae). Journal of Herpetology, 42(1):54--60, 2008.
  • [NoveSous2008] I. A. Novelli and B. M. de Sousa. Hydromedusa maximiliani (Brazilian snake-necked turtle). Hatchling size and body mass. Herpetological Review, 39(3):344--345, 2008.

Bibtex files with references for this entry

Bas Kooijman, 2017/10/07

accepted: 2017/10/07

refer to this entry as: AmP Hydromedusa maximiliani version 2017/10/07 bio.vu.nl/thb/deb/deblab/add_my_pet/